Rocks and earth

Rocks on Earth can be divided into three categories: magmatic rocks, sedimentary and metamorphic rocks sandstone belonging to one landscaping stone ..... rock is a natural output with a certain texture and structure of the mineral aggregate, constitute the crust and upper mantle The material basis. http://www.stonegroupon.com/

    Rough rocks can be divided into three categories, namely, igneous rocks, sedimentary and metamorphic rocks on Earth. Sedimentary rocks. As the name suggests, is a former student of rocks formed through erosion debris then be washed into the sea,stone tile lake beds, and other substances formed by stacking layers of these substances first by flowing, ice or strong wind, etc. into the water and sink to the bottom, then bonded under high pressure due to crustal movement resurface and become we see sedimentary rocks, including sandstone, shale, limestone and dolomite rock. In these rocks, especially shale and limestone rocks, you can find fossils of ancient times. Originally metamorphic rocks, because long buried by high fever, the action of pressure, just change the crystalline arrangement, shape and regenerated. For example, the original clay slate, quartzite sandstone deformation is reconstituted marble limestone rock.